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O.S. - OSMG7974 OSM73101010 73101010 531028604124 4531028604124
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  Tech Notes

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O.S. Long Prop Nut 5/16"-24
O.S. Long Prop Nut 5/16"-24
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Parts Saver Eligible:Yes

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Regularly Purchased Together
— Customers who purchased the above product also bought the following —
Although customers also purchased these, compatibility is not guaranteed. Click an item for product details.
1.  LXCT76 O.S. Prop Washer 61-90 3.29  Add To Cart
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Tech Notes
This is an 5/16" - 24 Long Prop Nut and Washer Set for the
O.S. Max .60FP, .65LA, .61FX, .91FX Engines.


Metal construction.
For use where an extra thick propeller boss (center) and/or spinner
backplate does not leave enough threads for a standard propeller
nut to tighten down onto the propeller. This nut has an extension
that goes through the propeller and then extends out past the end
of the crankshaft with a hex nut for tightening.
This also helps keep the propeller on the engine in the case of
backfiring or detonation.


One prop nut with 5/16"- 24 threading
One prop washer


9/16" open end wrench (15mm is slightly too big)


Propeller Nut- Extension Outer Diameter: 9.6mm
Extension Length: 13mm
Overall Length: 20mm
Inner Threading: 5/16" x 24
Propeller Washer- Inner Diameter: 10mm
Outer Diameter: 28mm
dew 3/24/01

– If you need more information, use these O.S. resources –
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:

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Parts Compatibility
Parts Compatibility for O.S. Long Prop Nut 5/16"-24
This item is an optional part for the following:
 LXAESD O.S. 65AX ABL w/Muffler  (Parts List)
 LXBY46 O.S. 61FX ABL w/Muffler  (Parts List)

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